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Ubuntu Security Notice USN-4541-1

Ubuntu Security Notice USN-4541-1
Posted Sep 28, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4541-1 - Tim Blazytko, Cornelius Aschermann, Sergej Schumilo and Nils Bars discovered that Gnuplot did not properly validate string sizes in the df_generate_ascii_array_entry function. An attacker could possibly use this issue to cause a heap buffer overflow, resulting in a denial of service attack or arbitrary code execution. Tim Blazytko, Cornelius Aschermann, Sergej Schumilo and Nils Bars discovered that Gnuplot did not properly validate string sizes in the PS_options function when the Gnuplot postscript terminal is used as a backend. An attacker could possibly use this issue to cause a buffer overflow, resulting in a denial of service attack or arbitrary code execution. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, code execution
systems | linux, ubuntu
advisories | CVE-2018-19490, CVE-2018-19491, CVE-2018-19492
SHA-256 | 4899b4998d8b6562ca856bc69ea8c153af0da3e8f57eaaaccfe87ed18a8c695a

Ubuntu Security Notice USN-4541-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4541-1
September 25, 2020

gnuplot vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Gnuplot.

Software Description:
- gnuplot: Command-line driven interactive plotting program

Details:

Tim Blazytko, Cornelius Aschermann, Sergej Schumilo and Nils Bars
discovered that Gnuplot did not properly validate string sizes in the
df_generate_ascii_array_entry function. An attacker could possibly use
this issue to cause a heap buffer overflow, resulting in a denial of
service attack or arbitrary code execution. (CVE-2018-19490)

Tim Blazytko, Cornelius Aschermann, Sergej Schumilo and Nils Bars
discovered that Gnuplot did not properly validate string sizes in the
PS_options function when the Gnuplot postscript terminal is used as a
backend. An attacker could possibly use this issue to cause a buffer
overflow, resulting in a denial of service attack or arbitrary code
execution. (CVE-2018-19491)

Tim Blazytko, Cornelius Aschermann, Sergej Schumilo and Nils Bars
discovered that Gnuplot did not properly validate string sizes in the
cairotrm_options function when the Gnuplot postscript terminal is used
as a backend. An attacker could possibly use this issue to cause a
buffer overflow, resulting in a denial of service attack or arbitrary
code execution. (CVE-2018-19492)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
gnuplot 4.6.6-3ubuntu0.1
gnuplot-data 4.6.6-3ubuntu0.1
gnuplot-nox 4.6.6-3ubuntu0.1
gnuplot-qt 4.6.6-3ubuntu0.1
gnuplot-tex 4.6.6-3ubuntu0.1
gnuplot-x11 4.6.6-3ubuntu0.1

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4541-1
CVE-2018-19490, CVE-2018-19491, CVE-2018-19492

Package Information:
https://launchpad.net/ubuntu/+source/gnuplot/4.6.6-3ubuntu0.1
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